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cachefiles: set default tag name if it's unspecified

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fscache_acquire_cache() requires a non-empty name, while 'tag <name>'
command is optional for cachefilesd.

Thus set default tag name if it's unspecified to avoid the regression of
cachefilesd. The logic is the same with that before rewritten.

Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
cc: linux-cachefs@redhat.com
Link: https://lore.kernel.org/r/164251399914.3435901.4761991152407411408.stgit@warthog.procyon.org.uk/ # v1
This commit is contained in:
Jeffle Xu 2022-01-14 15:30:29 +08:00 committed by David Howells
parent 5638b067d3
commit c7ca731557
1 changed files with 11 additions and 0 deletions
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11
fs/cachefiles/daemon.c
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@ -703,6 +703,17 @@ static int cachefiles_daemon_bind(struct cachefiles_cache *cache, char *args)
return -EBUSY;
}
/* Make sure we have copies of the tag string */
if (!cache->tag) {
/*
* The tag string is released by the fops->release()
* function, so we don't release it on error here
*/
cache->tag = kstrdup("CacheFiles", GFP_KERNEL);
if (!cache->tag)
return -ENOMEM;
}
return cachefiles_add_cache(cache);
}